The History of Element 43—TechnetiumRoberto ZingalesThe author is grateful for additional information that allowed him to correct an earlier mistake.Zingales, Roberto. J. Chem. Educ.2006, 83, 213.

Isotopes |

Nuclear / Radiochemistry |

Periodicity / Periodic Table

The History of Element 43—TechnetiumFathi HabashiThe article From Masurium to Trinacrium: The Troubled Story of Element 43 is the best story so far published about the history of technetium. There is, however, one paragraph on the right column of page 226 that is questionable.Habashi, Fathi. J. Chem. Educ.2006, 83, 213.

Isotopes |

Nuclear / Radiochemistry |

Periodicity / Periodic Table

The History of Element 43—TechnetiumFathi HabashiThe article From Masurium to Trinacrium: The Troubled Story of Element 43 is the best story so far published about the history of technetium. There is, however, one paragraph on the right column of page 226 that is questionable.Habashi, Fathi. J. Chem. Educ.2006, 83, 213.

Isotopes |

Nuclear / Radiochemistry |

Periodicity / Periodic Table

Measurement of the Isotopic Ratio of 10B/11B in NaBH4 by 1H NMRMurray Zanger and Guillermo MoynaA simple and remarkably accurate method for estimating the isotopic ratio between 10B and 11B through the use of 1H nuclear magnetic resonance (NMR) spectroscopy is presented. The experiment relies on the splitting caused by 10B (I = 3) and 11B (I = 3/2) on the 1H signal of a proton directly bound to boron, a phenomenon readily observed on an aqueous sample of NaBH4. In combination with a brief lecture or prelaboratory presentation, this laboratory can serve to introduce students to magnetic properties as well as theoretical and experimental aspects of NMR spectroscopy as early as the freshman-level chemistry. Zanger, Murray; Moyna, Guillermo. J. Chem. Educ.2005, 82, 1390.

How Radioactive Is Your Banana?David W. BallThis exercise uses a banana to illustrate the level of radioactivity (in this case, from K-40) in an everyday object. Ball, David W. J. Chem. Educ.2004, 81, 1440.

Food Science |

Nuclear / Radiochemistry |

Isotopes

A Strategy for Incorporating Hands-On GC-MS into the General Chemistry Lecture and Laboratory CoursesPerry C. Reeves and Kim L. PamplinStudents use the GC-MS to obtain spectra of the various halobenzenes. This vividly illustrates the differences in isotopic distributions of the halogens and the complications these differences present in calculating molar masses of compounds. The isotopic distribution of iron is then obtained from the mass spectrum of Fe(CO)5, and the students calculate the atomic mass of iron from this data. Reeves, Perry C.; Pamplin, Kim L. J. Chem. Educ.2001, 78, 368.

A Different Approach to a 3-D Periodic System Including Stable IsotopesAlexandru T. BalabanOn a Periodic System with the two dimensions represented by Periods and Columns, one may stack each stable nuclide of an element along the third dimension. This "Downtown Area" representation is helpful for interconnecting concepts of: element, isotope or nuclide (stable vs. radioactive), atomic weight, atomic number, mass number. Balaban, Alexandru T. J. Chem. Educ.1999, 76, 359.

Periodicity / Periodic Table |

Isotopes |

Nuclear / Radiochemistry

Nucleogenesis! A Game with Natural Rules for Teaching Nuclear Synthesis and DecayDonald J. Olbris and Judith HerzfeldNucleogenesis! is a simple and engaging game designed to introduce undergraduate physics or chemistry students to nuclear synthesis and decay by simulation of these processes. By playing the game, students become more familiar with nuclear reactions and the "geography" of the table of isotopes. Olbris, Donald J.; Herzfeld, Judith. J. Chem. Educ.1999, 76, 349.

Isotopes |

Nuclear / Radiochemistry |

Nonmajor Courses

Chemistry of the Heaviest Elements-One Atom at a TimeDarleane C. Hoffman and Diana M. LeeA 75-year perspective of the chemistry of the heaviest elements, including a 50-year retrospective view of past developments, a summary of current research achievements and applications, and some predictions about exciting, new developments that might be envisioned within the next 25 years.Hoffman, Darleane C.; Lee, Diana M. J. Chem. Educ.1999, 76, 331.

From the Research Laboratory to the Classroom: A Partners-in-Science ExperienceRobert ZafranThis article describes the usage of two diametrically different, spherically shaped polymer balls known to science educators as Happy/Unhappy Balls. The unique property of the polynorbornene (Norsorex), "Unhappy" ball, its reluctance to bounce, is paired with the normally bouncing polychloroprene (neoprene) "Happy" ball to teach students observational skills necessary for the effective application of scientific reasoning processes needed for investigative analysis.Zafran, Robert. J. Chem. Educ.1996, 73, 78.

Not So Late Night Chemistry with USDKoppang, Miles D.; Webb, Karl M.; Srinivasan, Rekha R.Through the program, college students enhance their knowledge and expertise on a chemical topic and gain experience in scientific presentations. They also serve as role models to the high school students who can relate to college students more easily than the chemistry faculty members and their high school students.Koppang, Miles D.; Webb, Karl M.; Srinivasan, Rekha R. J. Chem. Educ.1994, 71, 929.

A student experiment to demonstrate the energy loss and straggling of electrons in matterde Bruin, M.; Huijgen, F. W. J.The experiment described has been applied routinely for several years in introductory courses in the application of radiation and isotopes. The results obtained give direct insight into the characteristics of the phenomena associated with the absorption of energetic electrons in matter.de Bruin, M.; Huijgen, F. W. J. J. Chem. Educ.1990, 67, 86.

It's beanium!! Miller, Gregory C.Pinto, navy, and blackeye beans can be used to help students develop a macroscopic understanding of how isotopes are calculated.Miller, Gregory C. J. Chem. Educ.1981, 58, 507.

What is an element?Kolb, DorisReviews the history of the discovery, naming, and representation of the elements; the development of the spectroscope and the periodic table; radioactive elements and isotopes; allotropes; and the synthesis of future elements.Kolb, Doris J. Chem. Educ.1977, 54, 696.

Chemistry in art. Radiochemistry and forgeryRogers, F. E.It wasn't until a radiochemical analysis in 1968 that a 1937 forgery of a 17th century Dutch master was confirmed as a fake.Rogers, F. E. J. Chem. Educ.1972, 49, 418.

Using alligation alternate to solve composition problemsMancott, AnatolProblems involving the composition of mixtures may be solved by using the relatively obscure method of "alligation alternate" in lieu of the standard algebraic procedure with no loss in accuracy; includes five examples.Mancott, Anatol J. Chem. Educ.1972, 49, 57.

Chemometrics |

Solutions / Solvents |

Isotopes

Isotopy. A general chemistry experimentEhlert, Thomas C.The author describes an inexpensive paper-and-pencil experiment which has been used successfully as the first experiment in an introductory course for nonmajors.Ehlert, Thomas C. J. Chem. Educ.1971, 48, 273.

A kinetics experiment for first year chemistryShaefer, William P.The exchange of iodine atoms between organic and inorganic iodides serves as a kinetics experiment for first year chemistry.Shaefer, William P. J. Chem. Educ.1964, 41, 558.

Radioisotopes on your rooftopLockhart, Luther, B., Jr.The collection, recovery, and measurement of radioactive materials from atomic testing can be done through the use of relatively simple procedures and is a good exercise in tracer chemistry.Lockhart, Luther, B., Jr. J. Chem. Educ.1957, 34, 602.

Atomic-weight variations in natureBoggs, James E.Atoms of the same element may have different masses (due to isotopic differences) depending on their source.Boggs, James E. J. Chem. Educ.1955, 32, 400.

Recent history of the notion of a chemical speciesBulloff, Jack J.Quantum and nuclear chemistry have challenged the doctrine that chemical elements are homogeneous entities while studies of the structure and stoichiometry of solids invite a change in our ideas of definite proportions in chemical combinations.Bulloff, Jack J. J. Chem. Educ.1953, 30, 78.

Nuclear / Radiochemistry |

Isotopes |

Stoichiometry |

Solids

Radiations from radioactive materialsOrban, EdwardLists many radioactive minerals and ores and their sources and describes some simple demonstrations of radioactivity.Orban, Edward J. Chem. Educ.1952, 29, 289.

Nuclear / Radiochemistry |

Isotopes

Experiments on radioactivity in the first course in college chemistryBrown, Charles A.; Rochow, E. G.Experiments described include the detection and measurement of radioactivity; comparing the penetrative power of beta and gamma radiation; separating thorium from uranium; and determining the half-life of iodine 128.Brown, Charles A.; Rochow, E. G. J. Chem. Educ.1951, 28, 521.